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The difference between hard and soft water
Collect some hard water from a stream(or make some as defined in the next experiment). Also secure some soft water like as rain water or distilled water. Make some soap solution by dissolving soap shavings or powdered soap in a little warm water. Place equivalent amounts of hard and soft water in every of two bottles. Add soap solution to the soft water with a dropper, some drops at a time. Shake the bottle well after every addition. Count the number of drops of soap solution required to produce suds about 1 cm thick on the top.
Structure of Atoms Elements are pure substances. Elements are composed of a single kind of atom, as opposed to compounds which contain two or more kinds of atoms (see lesson 5).
To show the differences in soil particles Secure some glass jars that hold about half Gallon or two litres of water. Place various handfuls of soil in a jar. Fill the jar with
What is Heart Sounds? Have you ever heard your heart go lub...dub...? What are these sounds? "Lub" is the closing of the atrioventricular valves while "dub" is the closing of
Carbon atoms of fatty acids are numbered from carboxyl carbon. Various conventions are used to indicate the position of double bonds in the fatty acid molecules. Like,
Ask question how many years that our earth survived?#Minimum 100 words accepted#
mode of feeding f a lion
Explain the Constituents and Examination of Urine The quantity of urine in 24 hours in adult normal individual varies from 600 ml to 2500 ml. It is pale yellow in colour, hyper
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what is manipulating? What is responding variables?
Long Refractory period - Properties of a Beating Heart Refractory period is the period during which a stimulus fails to evoke a response. In a beating heart, if an external sti
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